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WorksheetsNon-destructive Quality Evaluation of Coffee and Cacao
Total questions: 12
Worksheet time: 35mins
Size and shape of coffee or cacao bean can be evaluated nondestructively by ...
NIR Spectroscopy
Ultrasonic
Impedance Spectroscopy
Image Processing
The chemical content of coffee and cacao bean can be determined nondestructively by
NIR Spectroscopy
Impedance spectroscopy
Image Processing
Ultrasonic
The following is the advantages of NIR spectroscopy, except ..
Very fast measurement and results
Nondestructive method
No need sample preparation
Single property determination
Limitation of NIR spectroscopy application for quality evaluation of agricultural materials is
dark color samples
white color samples
complicated data processing
slow measurement
The wavelength spectrum of NIR is in the region of
300 - 400 nm
400 - 700 nm
700 - 2500 nm
2500 – 4000 nm
NIR spectroscopy is one of the nondestructive method for quality evaluation of coffee and cacao bean that based on measurement of
Reflectance properties
Transmittance properties
Scattering properties
Transflectance properties
The best NIR Instrument for nondestructive evaluation of agricultural material is based on
filter system
Fourier Transform
grating system
combination of a,b and c system
The success of quality evaluation by NIR spectroscopy depend on
Instrument used
Characteristics of agricultural material
Proper chemometrics
All a,b, c correct
The spectra pretreatment for reducing noise is
Multiple Scattering Corrrection (MSC)
Normalization
Standard Normal Variate (SNV)
Smoothing
The high accuracy prediction by NIR spectroscopy can be indicated by
correlation coefficient (r) (>0,8)
RPD (>2)
Standard error calibration (SEC) equal to 1
Standard error prediction (SEP) equal to 1
You are requested to develop a detection of vitamin C in Orange fruit by NIR spectroscopy. Please discuss a recommendation for this project. Please describe the scientific aspects if this project can or could not be implemented !
From the results of quality evaluation of coffee (caffeine) using NIR spectroscopy, it is known that NIR can be used to predict caffeine content of Java Preanger coffee bean. Please discuss how to implement this research results so it can be used as a routine analysis in determination of caffeine content using NIR spectroscopy.. Please describe the processes or activities before implementing it. (for example SOP, etc)
